Black Friday: lifetime access is on a special offer in the app, until November 30. Black Friday: special offer on lifetime access, until November 30. Download
경뇌막은 뇌를 보호하는 중요한 역할을 합니다.gyeongnoemak-eun noe-reul bohohaneun jungyohan yeoghal-eul hamnida.The dura mater plays an important role in protecting the brain.